400,000 years ago, humans and Neanderthals created fire. This ignited a relationship between people and photons that changed the course of mankind—and continues to evolve to this day. Take a tour through the visual history of light in the video above, and read below for further information on the inventions. 400,000 BCE: Humans and Neanderthals deliberately begin making wood fire. 13,000 BCE: Humans create primitive animal grease lamps made from hollow rocks and shells, stuffed with moss, and coated in grease. 3,000 BCE: The "rushlight" candle is invented in Ancient Egypt.